Power transmission apparatus and power generation system having same

Abstract

A power transmission apparatus for transmitting power generated by a power generation apparatus to a generator and a power generation system including the same are provided. The power transmission apparatus for transmitting power generated by the power generation apparatus to the generator may include a first disk part connected to one of the power generation apparatus and the generator, a second disk part connected to the other one of the power generation apparatus and the generator and disposed on a rear side of the first disk part, and a connection part configured to connect the first disk part and the second disk part and include a portion that decreases and then increases in diameter along a longitudinal direction.

What is claimed is: 
     
       1. A power transmission apparatus for transmitting power generated by a power generation apparatus to a generator, the power transmission apparatus comprising:
 a first disk part connected to a shaft of the generator, the first disk part including a first coupling disk and a first disk shaft; 
 a second disk part connected to a shaft of the power generation apparatus and disposed on a rear side of the first disk part, the second disk part including a second coupling disk and a second disk shaft; and 
 a connection part configured to connect the first disk part and the second disk part and include a portion that decreases and then increases in diameter along a longitudinal direction, 
 wherein the first disk shaft and the second disk shaft are disposed between the first coupling disk and the second coupling disk, 
 wherein the first disk shaft is formed to protrude from a rotational center of the first coupling disk toward a rotational center of the second coupling disk and the second disk shaft is formed to protrude from the rotational center of the second coupling disk toward the rotational center of the first coupling disk. 
 
     
     
       2. The power transmission apparatus according to  claim 1 , wherein the connection part includes a recessed groove that is recessed radially inward from an outer circumferential surface. 
     
     
       3. The power transmission apparatus according to  claim 1 ,
 wherein the connection part is disposed between the first disk shaft and the second disk shaft, connecting the first disk shaft and the second disk shaft. 
 
     
     
       4. The power transmission apparatus according to  claim 3 , further comprising:
 a support part supporting the first disk shaft and the second disk shaft from a radially outward of the first disk shaft and the second disk shaft. 
 
     
     
       5. The power transmission apparatus according to  claim 4 , wherein the support part includes:
 a support body disposed on a radially outward of the first and second disk shafts; 
 a first support member extending radially inward from an inner circumferential surface of the support body to support the first disk shaft; and 
 a second support member extending radially inward from the inner circumferential surface of the support body and disposed on a rear side of the first support member to support the second disk shaft. 
 
     
     
       6. The power transmission apparatus according to  claim 5 , wherein the support part is interposed between the first support member and the first disk shaft, and between the second support member and the second disk shaft, respectively, and further includes a backup bearing rotatably supporting the first disk shaft and the second disk shaft. 
     
     
       7. The power transmission apparatus according to  claim 1 , wherein the second disk part is rotatably installed with respect to the first disk part. 
     
     
       8. The power transmission apparatus according to  claim 1 , wherein the first disk part includes:
 a first disk base coupled to a rear side of the first disk shaft, the first disk base being spaced apart from the first coupling disk; and 
 a first disk wall extending rearward from a radially outer end of the first disk base, the first disk wall being spaced apart from the first disk shaft, 
 wherein the second disk part includes: 
 a second disk base coupled to a front side of the second disk shaft and disposed to face the first disk base, the second disk base being spaced apart from the second coupling disk, and 
 wherein the connection part is disposed to penetrate through the first disk base and the second disk base. 
 
     
     
       9. The power transmission apparatus according to  claim 8 , wherein the first disk part further includes a first disk protrusion protruding rearward from the first disk base,
 wherein the second disk base includes a base groove into which the first disk protrusion is inserted into the front side, and 
 wherein the second disk part further includes a first backup bearing seated in the base groove and into which the first disk protrusion is inserted so that the first disk protrusion is rotatably supported. 
 
     
     
       10. The power transmission apparatus according to  claim 8 , wherein the second disk part further includes a second backup bearing interposed between the first disk wall and the second disk base to rotatably support the second disk base. 
     
     
       11. The power transmission apparatus according to  claim 9 , wherein the first disk part further includes a first disk support protrusion protruding rearward from the first disk base, wherein the first disk protrusion protrudes rearward from the first disk support protrusion and has a smaller diameter than the first disk support protrusion. 
     
     
       12. The power transmission apparatus according to  claim 11 , wherein the second disk part further includes a second disk support protrusion protruding forward from the second disk base and disposed to face the first disk support protrusion, wherein the base groove is formed on a radially inward of the second disk support protrusion. 
     
     
       13. The power transmission apparatus according to  claim 8 , wherein the connection part includes a connection member formed to penetrate through the first and second disk bases in a front-rear direction and having a portion whose diameter decreases and then increases along a longitudinal direction. 
     
     
       14. The power transmission apparatus according to  claim 13 , wherein the connection part further includes a pair of nut members coupled to both ends of the connection member protruding forward from the first disk base and rearward from the second disk base, respectively, and seated on a front surface of the first disk base and a rear surface of the second disk base, respectively. 
     
     
       15. The power transmission apparatus according to  claim 12 , wherein the second disk support protrusion is in contact with the first disk support protrusion. 
     
     
       16. The power transmission apparatus according to  claim 14 , wherein the connection part further includes a pair of cover members covering the pair of nut members from an outside of the pair of nut members. 
     
     
       17. The power transmission apparatus according to  claim 13 , wherein the connection member includes a recessed groove recessed radially inward from an outer circumferential surface thereof, and the connection part further includes a pair of locking members coupled to the connection member between the first disk base and the second disk base and spaced apart from each other in the front-rear direction so that the recessed groove is disposed therebetween, wherein the pair of locking members are seated on a rear surface of the first disk base and a front surface of the second disk base, respectively. 
     
     
       18. The power transmission apparatus according to  claim 12 , wherein the connection part includes a connection member formed to penetrate through the first and second disk bases in a front-rear direction and having a portion whose diameter decreases and then increases along a longitudinal direction, and
 the connection member includes a recessed groove recessed radially inward from an outer circumferential surface thereof, wherein a distance between the first disk support protrusion and the second disk support protrusion is greater than a width of the recessed groove in the front-rear direction.